Category: Eywa Explains
Abstract / Executive Summary
As governments and businesses intensify efforts to address climate change and biodiversity loss, environmental credit markets have expanded beyond carbon into the emerging field of biodiversity credits. Although both mechanisms mobilise private finance for environmental outcomes, they differ fundamentally in what they measure, the ecological problems they address, and the claims buyers can legitimately make.
This article critically compares carbon credits and biodiversity credits through an evidence-based review of academic literature, international policy frameworks, and emerging market practice. It explains the conceptual foundations of each instrument, examines their measurement methodologies, governance arrangements, and integrity challenges, and analyses why biodiversity credits should not be regarded as a direct analogue or replacement for carbon credits.
The evidence indicates that carbon credits are comparatively mature, with internationally recognised accounting methodologies centred on greenhouse gas reductions or removals. Biodiversity credits, by contrast, remain an emerging voluntary instrument focused on measurable positive outcomes for species, habitats, and ecosystems. Their greatest challenge lies in biodiversity’s inherently local, multidimensional, and context-specific nature, making standardisation considerably more complex.
The article concludes that these markets should be viewed as complementary rather than competing. Effective climate action requires rapid decarbonisation, while long-term ecological resilience depends equally on protecting and restoring biodiversity through credible, high-integrity nature finance.
Keywords: carbon credits, biodiversity credits, nature finance, voluntary carbon market, biodiversity conservation, ecosystem restoration, climate finance
Main article
1. Introduction
Climate change and biodiversity loss are frequently described as the twin environmental crises of the twenty-first century. While climate policy has increasingly focused on reducing greenhouse gas (GHG) emissions, scientists and policymakers have also recognised that stabilising the climate alone cannot halt the accelerating decline of ecosystems and species. The Kunming–Montreal Global Biodiversity Framework (GBF), adopted in 2022 by parties to the Convention on Biological Diversity, established the global objective of halting and reversing biodiversity loss by 2030 while mobilising at least USD 200 billion annually for biodiversity finance.
Within this context, biodiversity credits have emerged as a new financial instrument intended to channel private investment into conservation and ecosystem restoration. Their rapid emergence has inevitably prompted comparisons with the far more established carbon credit market.
However, treating biodiversity credits as “carbon credits for nature” is misleading. Carbon represents a globally comparable molecule of CO₂ equivalent, whereas biodiversity encompasses the diversity of genes, species, habitats, ecological interactions, and ecosystem functions. Consequently, the two markets differ not merely in methodology but in their underlying scientific and economic logic.
Objectives
This article aims to:
- Explain the conceptual differences between carbon and biodiversity credits.
- Compare their measurement, governance, and market structures.
- Evaluate the strengths and limitations of each mechanism.
- Discuss their implications for governments, businesses, and conservation finance.
2. Conceptual / Theoretical Background
2.1 What are carbon credits?
A carbon credit is a tradable unit representing one metric tonne of carbon dioxide equivalent (tCO₂e) that has either been removed from the atmosphere or whose emission has been demonstrably avoided through an eligible project.
Projects typically include:
- Forest conservation (REDD+)
- Afforestation and reforestation
- Renewable energy
- Methane capture
- Improved agricultural practices
Carbon markets exist in both compliance systems (such as emissions trading schemes) and voluntary markets, where organisations purchase credits to support climate commitments beyond regulatory obligations.
The underlying economic theory is relatively straightforward: because greenhouse gases mix globally within the atmosphere, one verified tonne of CO₂ reduction is considered broadly equivalent regardless of geographic location, provided robust accounting prevents double counting.
2.2 What are biodiversity credits?
A biodiversity credit is a verifiable, measurable, and tradable unit representing positive biodiversity outcomes generated through conservation, restoration, or improved ecosystem stewardship. Unlike carbon credits, biodiversity credits are primarily designed to finance nature-positive actions rather than compensate for environmental damage.
Potential projects include:
- Habitat restoration
- Species recovery programmes
- Wetland rehabilitation
- Coral reef restoration
- Indigenous and community-led ecosystem management
Crucially, biodiversity credits are outcome-oriented rather than carbon-oriented. They seek measurable improvements in ecological condition rather than reductions in atmospheric emissions.
2.3 Why biodiversity cannot be reduced to carbon
The scientific distinction is fundamental.
| Dimension | Carbon | Biodiversity |
| Primary unit | Tonnes CO₂e | Ecological outcomes |
| Spatial nature | Globally fungible | Highly location-specific |
| Measurement | Relatively standardised | Multiple ecological indicators |
| Main objective | Climate mitigation | Nature recovery |
| Scientific complexity | Single atmospheric metric | Multidimensional ecological system |
This difference explains why biodiversity credit methodologies have proliferated rather than converged into a single universal standard. More than 35 methodologies have already emerged, reflecting different ecosystems, species, and conservation objectives.
3. Literature and Evidence Review
3.1 The maturity of carbon markets
Carbon markets have developed over nearly three decades, supported by internationally recognised accounting frameworks, including the Greenhouse Gas Protocol, Verified Carbon Standard (VCS), Gold Standard, and national emissions trading systems.
Research generally agrees that high-quality carbon credits can contribute to climate finance when projects demonstrate:
- Additionality
- Permanence
- Robust monitoring, reporting and verification (MRV)
- Prevention of leakage
- Transparent registry systems
Nevertheless, the literature also documents significant integrity concerns surrounding over-crediting, baseline inflation, and inconsistent project quality. These debates have led to stronger governance initiatives rather than rejection of the market itself.
3.2 The emergence of biodiversity credit markets
Biodiversity credits remain an early-stage voluntary market. According to the World Economic Forum and the International Advisory Panel on Biodiversity Credits, the market is still experimental but has substantial potential to mobilise conservation finance if high-integrity governance is established.
Several factors have accelerated interest:
- The Kunming–Montreal Global Biodiversity Framework
- TNFD (Taskforce on Nature-related Financial Disclosures)
- Science Based Targets Network (SBTN)
- Growing corporate nature-risk reporting
Unlike carbon markets, demand is currently driven less by offsetting and more by corporate sustainability strategies, nature-positive commitments, and ecosystem risk management
3.3 Areas of Consensus
Despite the emerging nature of biodiversity credit markets, recent academic literature and international policy frameworks demonstrate growing agreement on several foundational principles.
First, there is broad consensus that private finance must play a much larger role in biodiversity conservation. Public funding alone is insufficient to meet the ambitious targets of the Kunming–Montreal Global Biodiversity Framework, creating a substantial financing gap that biodiversity credits seek to help address.
Second, researchers and market developers increasingly agree that biodiversity credits should reward measurable positive ecological outcomes rather than function as simple compensation for environmental damage. This distinction separates biodiversity credits from many traditional offsetting approaches and places greater emphasis on genuine nature recovery.
Third, there is strong agreement that Indigenous Peoples and local communities are essential partners in successful biodiversity projects. Evidence consistently shows that long-term conservation outcomes are more effective and equitable when projects recognise local land rights, incorporate traditional ecological knowledge, and ensure fair benefit-sharing.
Finally, the literature consistently identifies robust monitoring, reporting, and verification (MRV) as fundamental to market credibility. Without transparent ecological measurement and independent verification, biodiversity credits are unlikely to gain the trust of investors, regulators, or conservation practitioners.
4. Analysis and Discussion
4.1 Carbon and biodiversity solve different environmental problems
One of the most common misconceptions is that biodiversity credits can replace carbon credits. The evidence does not support this view.
Carbon credits primarily address climate mitigation by reducing atmospheric greenhouse gas concentrations. Biodiversity credits address ecosystem integrity, including species richness, habitat quality, ecological connectivity, and ecosystem resilience.
A forest illustrates this distinction well.
A rainforest restoration project may simultaneously:
- Remove atmospheric carbon,
- Improve habitat for endangered species,
- Restore water regulation,
- Increase pollinator diversity,
- Enhance soil health.
The carbon component can often be measured in tonnes of CO₂e, whereas biodiversity outcomes require multiple ecological indicators and long-term monitoring. The same project may therefore generate carbon value, biodiversity value, or both—but they are not interchangeable.
4.2 Measurement: the greatest challenge
Carbon accounting benefits from a single comparable metric. Biodiversity does not.
Current biodiversity methodologies commonly assess combinations of:
- Habitat condition
- Species abundance
- Species richness
- Ecosystem integrity
- Landscape connectivity
- Ecological restoration success
Rather than searching for one universal metric, recent research argues for comparable frameworks that allow different methodologies to be aligned while remaining ecologically appropriate.
This represents an important conceptual shift: consistency is prioritised over uniformity.
4.3 Integrity and governance
Both markets depend heavily upon trust.
For carbon credits, credibility depends on whether emission reductions are genuinely additional and durable.
For biodiversity credits, governance is arguably even more demanding because projects must demonstrate:
- Real ecological improvement
- Fair benefit sharing
- Indigenous rights protection
- Long-term stewardship
- Transparent ecological monitoring
The World Economic Forum’s High-Level Principles emphasise that biodiversity credits should generate positive outcomes for biodiversity, climate, and people simultaneously rather than functioning as a licence to damage ecosystems elsewhere.
4.4 Corporate use: offsetting versus contribution
Another critical distinction concerns buyer claims.
| Carbon credits | Biodiversity credits |
| Often linked to climate claims | Generally linked to nature-positive contribution |
| May support net-zero strategies | Supports biodiversity investment |
| Risk of offset misuse | Designed primarily for positive nature finance |
| Mature corporate guidance | Emerging governance principles |
Current guidance increasingly discourages companies from presenting biodiversity credits as compensation for unavoidable biodiversity impacts. Instead, firms are expected first to follow the mitigation hierarchy—avoid, minimise, restore, and only then consider offsets where appropriate. Biodiversity credits occupy a different role: financing additional positive outcomes rather than replacing responsible environmental management.
5. Challenges, Limitations, and Counterarguments
5.1 The measurement problem
The largest scientific challenge is that biodiversity is inherently heterogeneous.
A hectare of mangrove cannot be directly compared with a coral reef, alpine meadow, or tropical rainforest. Consequently, ecological equivalence remains contentious, and excessive simplification risks undermining conservation outcomes.
5.2 Risk of repeating carbon market mistakes
Critics argue that biodiversity markets could replicate earlier weaknesses observed in voluntary carbon markets, including:
- Weak additionality
- Poor baseline assumptions
- Double counting
- Greenwashing
- Unequal distribution of benefits
These concerns are widely acknowledged by both researchers and market developers, who advocate building stronger governance from the outset rather than retrofitting integrity later.
5.3 Equity and Indigenous rights
Evidence consistently highlights Indigenous Peoples and Local Communities (IPLCs) as essential stewards of biodiversity. Markets that fail to recognise land rights, free prior informed consent, and equitable benefit sharing risk producing conservation outcomes that are socially unjust and environmentally ineffective.
5.4 Is biodiversity too complex for markets?
A significant academic debate questions whether biodiversity should be commodified at all.
Supporters argue that assigning economic value attracts urgently needed conservation finance.
Critics contend that ecological systems possess intrinsic value that cannot be adequately represented through tradable units.
The available evidence does not resolve this philosophical disagreement. Instead, recent institutional guidance frames biodiversity credits as one financing tool among many, complementing public funding, regulation, and community-based conservation rather than replacing them.
6. Implications
For governments
Governments should develop clear regulatory frameworks that distinguish biodiversity credits from biodiversity offsets while ensuring alignment with national biodiversity strategies and the GBF.
For businesses
Companies should recognise that purchasing biodiversity credits does not substitute for reducing their own ecological impacts. Nature-positive strategies should begin with mitigation and operational improvement before investing in external biodiversity outcomes.
For investors
High-integrity projects will increasingly require robust ecological data, transparent MRV systems, and long-term governance arrangements. Investments should therefore prioritise measurable outcomes rather than marketing claims.
For conservation organisations
Biodiversity credits may provide a valuable supplementary revenue stream, particularly for landscape-scale restoration and community-led conservation, but they should complement rather than replace grants and public conservation finance.
7. Conclusion
Carbon credits and biodiversity credits represent two distinct but complementary environmental finance mechanisms. Carbon markets focus on mitigating climate change through measurable greenhouse gas reductions, benefiting from relatively standardised accounting frameworks and decades of methodological development. Biodiversity credits, by contrast, seek to finance measurable improvements in species, habitats, and ecosystem integrity, operating within a far more complex ecological context.
The strongest evidence suggests that biodiversity credits should not be treated as a direct equivalent of carbon credits. Their value lies not in creating a universal ecological currency but in mobilising investment for locally meaningful conservation outcomes supported by credible science, transparent governance, and equitable participation.
Ultimately, achieving global sustainability will require both decarbonisation and nature recovery. Climate stability without healthy ecosystems is insufficient, just as biodiversity conservation cannot succeed without addressing climate change. Rather than competing markets, carbon and biodiversity credits should be understood as complementary instruments within a broader transition towards nature-positive and climate-resilient economies.
References
- International Union for Conservation of Nature. (2024). Kunming–Montreal Global Biodiversity Framework.
- International Union for Conservation of Nature. (2025). Nature Credits.
- International Union for Conservation of Nature. (2021). Biodiversity Offsets.
- World Economic Forum. (2023). Biodiversity Credits: Demand Drivers and Guidance on Early Use.
- World Economic Forum. (2024). Nature Finance and Biodiversity Credits: A Private Sector Roadmap to Finance and Act on Nature.
- World Economic Forum. (2024). Biodiversity Credits: Demystifying Metrics for Nature Markets.
- World Economic Forum. (2025). High-Level Principles for the Biodiversity Credit Market.
- Antonelli, A., et al. (2024). How biodiversity credits could help to conserve and restore nature. Nature.